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[209.132.180.67]) by mx.google.com with ESMTP id f64-v6si11970746plf.624.2018.03.18.23.38.53; Sun, 18 Mar 2018 23:39:07 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@oracle.com header.s=corp-2017-10-26 header.b=sxZiAuO0; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=oracle.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755310AbeCSGhj (ORCPT + 99 others); Mon, 19 Mar 2018 02:37:39 -0400 Received: from userp2130.oracle.com ([156.151.31.86]:44234 "EHLO userp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755169AbeCSGhh (ORCPT ); Mon, 19 Mar 2018 02:37:37 -0400 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.22/8.16.0.22) with SMTP id w2J6bT56193888; Mon, 19 Mar 2018 06:37:29 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=date : from : to : cc : subject : message-id : references : mime-version : content-type : in-reply-to; s=corp-2017-10-26; bh=7CMztjpO+sykVbpyre5lcUJpaadP9r+A6KlybFn3LJk=; b=sxZiAuO0WlwE2GGwenm4xLJqcm3ItsMrtfo0QvxvuLX/pUu1b3IsYaYYhAQHkS4gGZM9 BHbqAp1JyJkxcCDKrDSk70IXXxq6F/3UpvibvYQxYlMoHiL0a7ImQWj4cDZ7nbSbTyV8 T73ROk/JaGDCeLxytE8dERUfWjLGX4f+e9/4C7SvEZhALLD9X1BjUxOKv83qtp0Yw86W 0HnZl6Zawz4MNTzwp6pK82ZiYlK8a4+ZNLj9xvR5+4hlRZ0sHf9KcwCn50Na711t78jm 7ChaAlYjMHtzMDHMSkk4q5RtgBWkkCAwCdbWESxy24DIY7ROg590nqmjyBQ1zo+4ixOg 5g== Received: from userv0022.oracle.com (userv0022.oracle.com [156.151.31.74]) by userp2130.oracle.com with ESMTP id 2gt83s0003-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 19 Mar 2018 06:37:29 +0000 Received: from userv0121.oracle.com (userv0121.oracle.com [156.151.31.72]) by userv0022.oracle.com (8.14.4/8.14.4) with ESMTP id w2J6bSpV008262 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 19 Mar 2018 06:37:28 GMT Received: from abhmp0004.oracle.com (abhmp0004.oracle.com [141.146.116.10]) by userv0121.oracle.com (8.14.4/8.13.8) with ESMTP id w2J6bRSV014434; Mon, 19 Mar 2018 06:37:27 GMT Received: from oracle.com (/31.133.157.172) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Sun, 18 Mar 2018 23:37:27 -0700 Date: Mon, 19 Mar 2018 02:37:08 -0400 From: Sowmini Varadhan To: Dmitry Vyukov Cc: syzbot , David Miller , LKML , linux-rdma@vger.kernel.org, netdev , rds-devel@oss.oracle.com, Santosh Shilimkar , syzkaller-bugs@googlegroups.com Subject: Re: KASAN: slab-out-of-bounds Read in rds_cong_queue_updates Message-ID: <20180319063708.GB20345@oracle.com> References: <001a114aacf82781120565c9f4fe@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.24 (2015-08-30) X-Proofpoint-Virus-Version: vendor=nai engine=5900 definitions=8836 signatures=668693 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=2 malwarescore=0 phishscore=0 bulkscore=0 spamscore=0 mlxscore=0 mlxlogscore=599 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1711220000 definitions=main-1803190007 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On (03/19/18 09:29), Dmitry Vyukov wrote: > > This looks the same as: > > #syz dup: KASAN: use-after-free Read in rds_cong_queue_updates correct, seems like the rds_destroy_pending() fixes did not seal this race condition. I need to look at this more carefully to see what race I missed.. no easy answer here, I am afraid. --Sowmini